Light-emitting device with yellow color filters

Abstract

A light-emitting device is provided. The light-emitting device includes a substrate including a plurality of pixels, each pixel including a plurality of subpixels designed to emit light with different colors. The plurality of subpixels includes a first subpixel designed to emit red light, a second subpixel designed to emit green light, and a third subpixel designed to emit blue light. The first subpixel includes a first light source formed on the substrate, a red light-emitting layer covering the first light source, and a first yellow color filter covering the red light-emitting layer. The second subpixel includes a second light source formed on the substrate, a green light-emitting layer covering the second light source, and a second yellow color filter covering the green light-emitting layer. The third subpixel includes a third light source formed on the substrate. A method for fabricating the light-emitting device is also provided.

What is claimed is: 
     
       1. A light-emitting device, comprising:
 a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise: 
 a first subpixel designed to emit red light, comprising:
 a first light source formed on the substrate; 
 a red light-emitting layer covering the first light source; and 
 a first yellow color filter covering the red light-emitting layer; 
 
 a second subpixel designed to emit green light, comprising:
 a second light source formed on the substrate; 
 a green light-emitting layer covering the second light source; and 
 a second yellow color filter covering the green light-emitting layer; and 
 
 a third subpixel designed to emit blue light, comprising:
 a third light source formed on the substrate, 
 
 wherein the first yellow color filter and the second yellow color filter comprise yellow pigments blended in a polymer matrix. 
 
     
     
       2. The light-emitting device as claimed in  claim 1 , wherein the first light source, the second light source and the third light source emit deep blue light. 
     
     
       3. The light-emitting device as claimed in  claim 2 , further comprising a blue light-emitting layer covering the third light source. 
     
     
       4. The light-emitting device as claimed in  claim 3 , wherein the blue light-emitting layer comprises blue phosphor. 
     
     
       5. The light-emitting device as claimed in  claim 3 , further comprising a first light guiding layer formed between the first light source and the red light-emitting layer, a second light guiding layer formed between the second light source and the green light-emitting layer, and a third light guiding layer formed between the third light source and the blue light-emitting layer. 
     
     
       6. The light-emitting device as claimed in  claim 1 , wherein the first light source, the second light source and the third light source emit blue light. 
     
     
       7. The light-emitting device as claimed in  claim 6 , further comprising a first light guiding layer formed between the first light source and the red light-emitting layer, a second light guiding layer formed between the second light source and the green light-emitting layer, and a third light guiding layer covering the third light source. 
     
     
       8. The light-emitting device as claimed in  claim 1 , wherein the red light-emitting layer comprises red phosphor. 
     
     
       9. The light-emitting device as claimed in  claim 1 , wherein the green light-emitting layer comprises green phosphor. 
     
     
       10. The light-emitting device as claimed in  claim 1 , wherein the first yellow color filter and the second yellow color filter have a thickness which is in a range from 0.8 μm to 2.0 μm. 
     
     
       11. The light-emitting device as claimed in  claim 1 , wherein the first light source constitutes a first micro LED device, the second light source constitutes a second micro LED device, and the third light source constitutes a third micro LED device. 
     
     
       12. The light-emitting device as claimed in  claim 11 , wherein each of the first micro LED device, the second micro LED device and the third micro LED device has a width which is in a range from 1 μm to 100 μm. 
     
     
       13. A light emitting device, comprising:
 a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise: 
 a first subpixel designed to emit red light, comprising:
 a first light source formed on the substrate; 
 a red light-emitting layer covering the first light source; and 
 a first yellow color filter covering the red light-emitting layer; 
 
 a second subpixel designed to emit green light, comprising:
 a second light source formed on the substrate; 
 a green light-emitting layer covering the second light source; and 
 a second yellow color filter covering the green light-emitting layer; and 
 
 a third subpixel designed to emit blue light, comprising:
 a third light source formed on the substrate, 
 
 wherein the first yellow color filter and the second yellow color filter have a light transmittance rate which is less than 1% for light with a wavelength of 400 nm to 480 nm. 
 
     
     
       14. A light-emitting device, comprising:
 a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise: 
 a first subpixel designed to emit red light, comprising:
 a first light source formed on the substrate; 
 a red light-emitting layer covering the first light source; and 
 a first yellow color filter covering the red light-emitting layer; 
 
 a second subpixel designed to emit green light, comprising:
 a second light source formed on the substrate; 
 a green light-emitting layer covering the second light source; and 
 a second yellow color filter covering the green light-emitting layer; and 
 
 a third subpixel designed to emit blue light, comprising:
 a third light source formed on the substrate, 
 
 wherein the first yellow color filter and the second yellow color filter have a light transmittance rate which is greater than 80% for light with a wavelength of 550 nm or above. 
 
     
     
       15. A light-emitting device, comprising:
 a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise: 
 a first subpixel designed to emit red light, comprising:
 a first light source formed on the substrate; 
 a red light-emitting layer covering the first light source; and 
 a first yellow color filter covering the red light-emitting layer; 
 
 a second subpixel designed to emit green light, comprising:
 a second light source formed on the substrate; 
 a green light-emitting layer covering the second light source; and 
 a second yellow color filter covering the green light-emitting layer; and 
 
 a third subpixel designed to emit blue light, comprising:
 a third light source formed on the substrate, 
 
 wherein the first yellow color filter and the second yellow color filter have a light transmittance rate which is equal to 50% for light with a wavelength of 490 nm to 530 nm. 
 
     
     
       16. A light-emitting device, comprising:
 a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise: 
 a first subpixel designed to emit red light, comprising:
 a first light source formed on the substrate; 
 a red light-emitting layer covering the first light source; and 
 a first yellow color filter covering the red light-emitting layer; 
 
 a second subpixel designed to emit green light, comprising:
 a second light source formed on the substrate; 
 a green light-emitting layer covering the second light source; and 
 a second yellow color filter covering the green light-emitting layer; and 
 
 a third subpixel designed to emit blue light, comprising:
 a third light source formed on the substrate, 
 
 wherein the first yellow color filter and the second yellow color filter have curved structures or polygonal structures in a cross-section perpendicular to the substrate.